Of course, any mother is extremely sad to realize that her baby grows up and becomes more independent. But this is absolutely normal process and otherwise can not simply be, everyone passes through this. Mom just need to put up with it and help the kid in his development.
The best development medium is the sex. Let the child "lead sex life", that is, play, learn to crawl, turn over, sit and stand. Much calmer and mother, and more interesting crumbs, when all this happens on the floor. You can just lay a carpet on the floor, and on top several blankets, so that the child does not catch a cold, and sketch toys there. But it's even better and more useful if you create a mat. Let the rug will use different types of fasteners, fabrics of different colors, textures and sizes, different figures. You can fill small bags with cereals, peas, something ringing and sew them to the rug. In general, you can fantasize on this topic endlessly, it would be a wish! And the desire will be thanks to your crumbs always! The benefit of a developing rug is difficult to underestimate - the kid will touch and feel everything, thus learning the world and developing the motor skills of the hands.
Do not put the child in a riding hall or in a walker! Also, it is not necessary for the child to sit for a long time in his crib and in the stool. All these things limit the space for the development of the child. A crumb must necessarily try to crawl somewhere, touch something and, of course, taste (and where to go from this, it's a natural process!).
Do not be frightened if suddenly your kid took the habit of throwing things and crushing everything in his way. Each child undergoes a stage of destruction in its development. This period is very important for the development of thought processes of crumbs. So he learns the logical operation of analysis (division into parts) and causal relationships. For example: I jerked the newspaper aside - it broke - now the newspaper has become two. Or: I threw the rattle out of the crib - my mother picked it up - gave it to me. Give the baby a chance to satisfy his needs: build a turret of cubes for him, and let him destroy it; Give the child a magazine - let him tear it into shreds. Do not scold the crumb for throwing things out of your hands, but patiently, time after time, pick them up. For a walk, you can tie toys with ropes to the stroller. So the child can throw them away, and at the same time the toys will remain clean.
At this age, all children just love to press their fingers on the buttons, poke in various holes, etc. In this case, moms often reach the semi-shock state. To the natural curiosity of the baby has not gone into obsessive desire (for example, shove a finger in the socket), satisfy the need for crumbs, buy him the appropriate toys.
Now there is a great many companies that offer educational toys for children. But not every family can afford them, as often such toys are too expensive.
Do not be depressed! Children do not care what to play and they do not care how much the toy costs. It's not a fact that the kid will be played an expensive toy, and at the same time, he can play for hours with the usual candy wrapper.
And remember: the child is already developing! Your task at the same time: just do not interfere with it and push it in the right direction!